Resum:

The proposes of this dissertation were to examine the effects of used optimal load and repetitions when performing power training in mechanical, physiological and psychological variables, and compare the influence of various rest interval durations used between sets in bench press throw with optimal load. The following are major findings of the dissertation. A short-term power training period with optimal load and repetitions produces improvements in power variables (i.e. jump height, throw distance, and peak power). The training load impact on the athlete was low when we used the optimal repetitions number (i.e. minor hormonal changes and less mood disturbance). The improvements in power output when use this method of power training must be associated with neural changes. Two resting minutes between sets was enough to maintain the power output using the optimal load in the bench press throw. This dissertation indicates that the power training with optimal load and repetitions may be considered as a great power training method, especially in sports with condensed competitive calendars, where the preparatory periods are time limited. Therefore, it is demonstrate the importance of individualization of training load when the aim is to improve the power output in a short-training period. However is suggested that future research should continue to investigate the factors that are associated with the adaptation to this method and the possible different effects in athletes with power training history. The findings of this dissertation also indicate that two minutes of rest between sets is enough in the bench press throw with optimal load. It is suggested that further research is needed with different ballistics and non-ballistics exercises and optimal load and repetitions to identify the optimal recovery time for them. Key Words: strength training, cortisol, testosterone, mood states, rest interval